Question

我正在开发ASP.NET核心应用程序，我在其中实现了将从appsetting.json

读取值的功能

为此，我正在学习本教程 - http://benjii.me/2016/04/new-configuration-appsettings-mvc6-web-config-gone/

在本教程中，我遵循以下方式自动绑定所有应用程序设置 -

public IServiceProvider ConfigureServices(IServiceCollection services)
{            
    services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));
}

在这一特定行 - services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));上，我得到的是异常 -

类型＆＃39; System.TypeLoadException＆＃39;的例外情况发生在   Microsoft.Extensions.OptionsModel.dll但未在用户代码中处理

其他信息：无法加载类型   ＆＃39; Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions＆＃39;   来自assembly＆＃39; Microsoft.Extensions.DependencyInjection.Abstractions，   Version = 1.0.0.0，Culture = neutral，PublicKeyToken = adb9793829ddae60＆＃39;。

Project.json

{
  "dependencies": {
    "Microsoft.AspNetCore.Diagnostics":"1.0.0",
    "Microsoft.AspNetCore.Identity": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.0",
    "Microsoft.AspNetCore.Mvc.TagHelpers": "1.0.0",
    "Microsoft.AspNetCore.Mvc.WebApiCompatShim": "1.0.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.Extensions.Configuration.CommandLine": "1.0.0",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
    "Microsoft.EntityFrameworkCore.SqlServer.Design": {
      "version": "1.0.0",
      "type": "build"
    },
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    }
  },

  "tools": {
    "BundlerMinifier.Core": "2.0.238",
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
    "Microsoft.Extensions.SecretManager.Tools": "1.0.0-preview2-final",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8"
      ]
    }
  },

  "frameworks": {
    "net461": { }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "web.config",
      "Views",
      "Areas/**/Views",
      "appsettings.json"
    ]
  },

  "scripts": {
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

我无法弄清楚我在这里缺少什么。有人可以指出我在这里失踪吗？

我的环境是VS2015 Professional update3和Windows 7计算机。

谢谢＆amp;此致

维沙尔

Answer 1

在project.json

中添加以下包

"Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0"

此包包含具有扩展方法IServiceCollection Configure<TOptions>

的OptionsConfigurationServiceCollectionExtensions类

在启动

1 个答案: